code: def forward(self, sample):
      sample = self.linear_1(sample)
  
      if self.act is not None:
          sample = self.act(sample)
  
      sample = self.linear_2(sample)
      return sample
  
file_path: PaddleHub/modules/image/text_to_image/stable_diffusion/diffusers/models/embeddings.py
imports: import math
  import numpy
  import paddle
  import paddle.nn
  import paddle.nn.functional
label_desc: Use image node_id 2 for calling the TimestepEmbedding obj's underlying member method code with example usage: obj.forward(sample) and returns: sample